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https://issues.apache.org/jira/browse/BEAM-6021?focusedWorklogId=168350&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-168350
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ASF GitHub Bot logged work on BEAM-6021:
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Author: ASF GitHub Bot
Created on: 21/Nov/18 16:31
Start Date: 21/Nov/18 16:31
Worklog Time Spent: 10m
Work Description: mareksimunek commented on issue #6998: [BEAM-6021]
Registred more internal classes for kryo serialization
URL: https://github.com/apache/beam/pull/6998#issuecomment-440728979
@aviemzur Hi, you are influenced by this change only if you use
`conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");`
Added more internal classes which are used and test to show that is used
KryoSerializer.
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Issue Time Tracking
-------------------
Worklog Id: (was: 168350)
Time Spent: 1h 50m (was: 1h 40m)
> Use Kryo spark.serializer instead of JavaSerializer
> ---------------------------------------------------
>
> Key: BEAM-6021
> URL: https://issues.apache.org/jira/browse/BEAM-6021
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Affects Versions: 2.8.0
> Reporter: Marek Simunek
> Assignee: Marek Simunek
> Priority: Major
> Fix For: 2.9.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> By default is set spark.serializer=org.apache.spark.serializer.JavaSerializer.
> Because all objects from user are using Beam coders it will affect only
> internal objects for spark translation.
> So why not use more optimal {{org.apache.spark.serializer.KryoSerializer}}
> and force spark runner contributors to register classes in
> {{BeamSparkRunnerRegistrator}} by setting
> {{spark.kryo.registrationRequired=true)}}.
> More information about benefits of [kryo
> serialization|https://spark.apache.org/docs/latest/tuning.html#data-serialization]
> over java serializer.
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